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MG MGB GT V8 Factory Originals Technical - New Wiring Harness Routing

I recently received the B from body and paint work. (Mercedes Brilliant Silver looks GREAT on these cars!) Ordering a new wiring harness from Dan Masters is the next step. But, I have a couple of general routing questions. With dual exhaust, I intend to relocate the harness to within the cabin rather than under. Has anyone done this? And, have any of you been successful in hiding the harness running into the engine bay? Thanks in advance.
Michael Willis

Running the harness through the cockpit is an old rally trick (along with fuel and brake lines, etc.

If you have enough room, run along the sill and/or the transmission tunnel. This depends on which seats you are using.

Another alternative would *have been* to run som conduit through the sills prior to paint (when the internal sills were accessible) and run the harness through the conduit.

FWIW

rick
rick ingram

Once my finances are more stable (self employment has its perils!) I'm going to get a harness from Dan and set up an engine bay with NO wires showing. I think the best way to do this is to put the fuse panel in the cockpit (passenger side?) and run the wires through split loom tubing up under the edges where the bonnet closes.

Anyone else have any ideas?
Justin

Kind of late to think about making any changes as the body is already painted. The only thing I can think of is perhaps using conduit bent to shape to route the wiring through and then paint it to match the body. This might be a real pain as you are using a new harness, usually this type of cusom work is done while making up a harness from scratch.
Bill Young

Justin, you could also run it between the front fender and the inner fender(lights). Some of the wires (starter, washer pump) could be run under or through the front frame section and brought to the engine under a motor mount. They would only be seen from below!
Jeff Schlemmer

I suppose I should mention that I have to figure out how to hide fuel injection wiring!
Justin

I always run the wiring inside the cabin with the fuse panel in the passenger footwell. On the last car I made a false panel to hide the fuse panel & the MSD. It is easy to hide normal wiring, but I do't have a clue how to hide all the wiring for fuel injection. Some, such as he pigtail at the mass air flow sensor can be tucked out of sight, but 8 injectors? Sensors? Impossible to hide all of that unless you fab an engine cover, & then you hide the engine.

Best suggestion is to customize the harness to keep the wires as short & orderly as possible & be happy driving.
Jim Stuart

I was thinking about putting the main harness between the valley gasket, and the bottom of the manifold, and running up and around to the sensors from there. Basically the wiring would only show on the manifold itself, and only in very short bits. I would have to insulate the crap out of the harness so it didn't melt. The injectors would show, and a few of the sensors would show. That can't be avoided, but the majority of the wiring (I think) could be hidden very well.

I was thinking about putting the fuse panel at the front of the foot well, right against the firewall. My ecu computer is mounted on the top of the footwell, and I have a speaker box in the cavity behind the fender, so that leaves me few options.

Is that what you did Jim?
Justin

I put the computer in the map pocket & let the diognostic LED stick up a bit so I could see it. The fuse panel is upright at the very back of the footwell on the passenger side behind where the pedals would be on a right hand drive. Both are close together so wire lengths are shorter.

There is a ridge on the transmission tunnel just a few inches back from the fire wall & I pushed a false panel against the ridge & a piece of light steel angle on the outer kick panel to hide the wiring on the yellow car. I magnet holss it all in place. I will probably do the same on the burgundy roadster.
Jim Stuart

Justin,

What material would you recommend to "insulate the crap out of the harness so it didn't melt"?
Michael Willis

Several companies make wraps designed to go over either fuel rails, or wiring harnesses to keep them from melting. Thermo-tec is one company that makes it.

Justin
Justin

This thread was discussed between 28/03/2005 and 30/03/2005

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